Greenwich AeroGroup has named Ralph Kunz as general manager of Summit Aviation. Kunz has more than 20 years experience in aerospace operations. He will be responsible for operations at Summit’s Middletown, Del., and Somerset, Ky. facilities. Kunz most recently served as vice president of operations for Airborne Tactical Advantage. Previously he held senior leadership positions with Keystone/Sikorsky Helicopters, Vector Aerospace and Parker Hannifin.